18425645 has 32 divisors (see below), whose sum is σ = 26984448. Its totient is φ = 11803968.

The previous prime is 18425633. The next prime is 18425647. The reversal of 18425645 is 54652481.

It is not a de Polignac number, because 18425645 - 2⁸ = 18425389 is a prime.

It is a super-3 number, since 3×18425645³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18425647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37592 + ... + 38078.

It is an arithmetic number, because the mean of its divisors is an integer number (843264).

Almost surely, 2^18425645 is an apocalyptic number.

It is an amenable number.

18425645 is a deficient number, since it is larger than the sum of its proper divisors (8558803).

18425645 is a wasteful number, since it uses less digits than its factorization.

18425645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569.

The product of its digits is 38400, while the sum is 35.

The square root of 18425645 is about 4292.5103377860. The cubic root of 18425645 is about 264.1238179907.

The spelling of 18425645 in words is "eighteen million, four hundred twenty-five thousand, six hundred forty-five".